VOA慢速英语:科学家称转基因大米能预防艾滋病

modified – adj. changed in a way to improve something

neutralize – v. produce an effect that removes the effect of something else

transmission – n. the process of passing something from one person or place to another

oral – adj. taken by mouth

groundbreaking – adj. original and important; showing a new way of doing or thinking about things

cream – n. a thick, smooth substance usually put on the skin